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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 33 |
| 3 | 3573 |
| 4 | 105766 |
| 5 | 2714834 |
| 6 | 60084175 |
| 7 | 1216849775 |
| 8 | 23300375254 |
| 9 | 428250392864 |
| 10 | 7629943002132 |
| 11 | 132678096634884 |
| 12 | 2262509340153066 |
| 13 | 37965514525586842 |
| 14 | 628531537599590562 |
| 15 | 10286765597910167301 |
| 16 | 166699691600830412057 |
[0,33,3573,105766,2714834,60084175,1216849775, 23300375254,428250392864,7629943002132, 132678096634884,2262509340153066, 37965514525586842,628531537599590562, 10286765597910167301,166699691600830412057] |